Rod connection for pump handles and the like



July 26, 1927. 1,637,125

H. B. NELSON ROD CONNECTION FOR PUMP HANDLES AND THE LIKE Filed March 27. 1923 INVENTOR ATTORNEY Patented July 26, 1927.

UNITED STATES HARRY B. NELSON, 0F SAGINAW, MICHIGAN, ASSIGNOR T0 NELSON BROTHERS 00., OF

PATENT OFF-ICE.

SAGINAW, MICHIGAN, A CORPORATION 0]! MICHIGAN.

BOD CONNECTION FOR PUMP HANDLES AND THE LIKE.

Application filed March 27, 1923. Serial No. 628,013.

This invention relates to an improved construction of joint for connecting a reciproeating rod and a movable head, as for example, the plunger rod of a kitchen pump and the head of the pump handle.

The objects of m improvement are to provide a simple an inexpensive construction that will enable such joints to be produced as articles of manufacture in large quantities at relatively small expense. More specifically, this object is to so improve the construction of joints of the class referred to as to avoid the necessity for drilling, threading and tapping and the use of separate pintle bolts.

A further object is to provide a joint which will enable the end of the rod to be quickly attached to the handle and detached Without removin bolts or nuts.

A still further ob ect is to provide a construction enabling the joint to operate in use with a relatively small amount of friction and to this end my construction employs a steel surface of the rod bearing on a cast iron surface of the pintle. The latter surface is, moreover, so shaped as to afford a maximum of bearing area on the rod.

With the foregoing and certain other ob jects in view which will appear later in the specification, m invention comprises the devices describe and claimed and the equivalents thereof.

In the drawings, Fig. 1 is a side view of a pump rod and handle embodying my improvement.

Fig. 2 is an enlarged part sectional side view of my improved joint.

Fig. 3 is a front View of the head of the handle without the rod.

Fig. 4 is a part sectional detail showing the manner of assembling and disassembling the rod and handle.

Fig. 5 is a similar view showing the relative positions of the loop of the rod and head of the handle when the plunger is on its down stroke.

As is clearly shown in the drawings, 1 indicates a pump plunger or anfy other device to be actuate by means 0 the longitudinally reciprocating rod 2.

The rod 2 is connected to the handle 3 by my improved joint, the construction of which in its preferred form is shown in Figs. 2 to 5. I dispense with the usual transverse pintle bolt through the head of the pump handle and instead cast the handle with its head and the pintle 5 all in one piece.

The head 4 is bifurcated according to the usual practice in the manufacture of cast pump handles, but in my improved construction the pintle is cast integral with the sides or cheeks of the head. The pintle is preferably substantially spool-shaped, that is, of

smaller diameter at its middle than at its ends as shown in Fig. 3, so as to more closely conform to the shape of the hook 6 of rod 2. This hook is preferably made from a down into its working position, as shown in Fig. 1.

On the lip-stroke, or working stroke, the hook 6 rests with large bearing area upon the spool-shaped pintle 5, the bearing pressure occuring between the top surface of the pintle 5 and the interior surface of hook 6, as shown in Fig. 2. On its down-stroke the hook bears With its upper surface upon the under side of the pocket-like curved shoulder 7 as shown in Fig. 5. On the down-stroke the load is entirely removed from the pintle.

By the means above described I have produced a simple and inexpensive joint especially adapted to use on kitchen pumps" and the like, but may be used in many other applications where a plunger rod is to be removably secured to a reciprocating head. It will be noted that the joint, as an article of manufacture is fabricated without any machine work on the handle or pintle, and only one punch press operation is required to form the hook 6 on rod 2. The joint is thus admirably adapted for economical quantity production.

Having thus described my invention, what I claim and desire to secure by Letters Patent is In a joint for the handles and plunger rods of pumps, a bifurcated head on said pump handle, said head having side walls spaced apart, a pintle cast integral with the Walls of said head and spmming the. space therebetwecn, an interiorly curved shoulder member connecting the upper parts of said walls and spanning part of said space to a point directly above Sziidpintle, a pumprod and a U-shnped hook" on said'rod partly HARRY B. NELSON. 

